java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 22:11:50,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 22:11:50,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 22:11:50,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 22:11:50,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 22:11:50,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 22:11:50,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 22:11:50,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 22:11:50,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 22:11:50,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 22:11:50,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 22:11:50,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 22:11:50,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 22:11:50,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 22:11:50,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 22:11:50,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 22:11:50,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 22:11:50,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 22:11:50,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 22:11:50,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 22:11:50,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 22:11:50,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 22:11:50,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 22:11:50,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 22:11:50,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 22:11:50,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 22:11:50,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 22:11:50,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 22:11:50,703 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 22:11:50,717 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 22:11:50,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 22:11:50,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 22:11:50,718 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 22:11:50,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 22:11:50,719 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 22:11:50,719 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 22:11:50,719 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 22:11:50,719 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 22:11:50,720 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 22:11:50,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 22:11:50,720 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 22:11:50,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 22:11:50,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 22:11:50,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 22:11:50,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 22:11:50,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 22:11:50,721 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 22:11:50,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 22:11:50,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 22:11:50,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 22:11:50,722 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 22:11:50,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 22:11:50,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 22:11:50,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 22:11:50,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 22:11:50,723 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 22:11:50,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 22:11:50,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 22:11:50,724 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 22:11:50,752 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 22:11:50,764 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 22:11:50,767 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 22:11:50,769 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 22:11:50,769 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 22:11:50,770 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label48.c [2019-10-02 22:11:50,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304e46acd/210c9852a524401490a355a21d432ae7/FLAG3af773fa9 [2019-10-02 22:11:51,526 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 22:11:51,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label48.c [2019-10-02 22:11:51,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304e46acd/210c9852a524401490a355a21d432ae7/FLAG3af773fa9 [2019-10-02 22:11:51,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304e46acd/210c9852a524401490a355a21d432ae7 [2019-10-02 22:11:51,665 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 22:11:51,666 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 22:11:51,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 22:11:51,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 22:11:51,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 22:11:51,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 10:11:51" (1/1) ... [2019-10-02 22:11:51,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e611eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:11:51, skipping insertion in model container [2019-10-02 22:11:51,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 10:11:51" (1/1) ... [2019-10-02 22:11:51,685 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 22:11:51,839 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 22:11:53,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 22:11:53,211 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 22:11:53,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 22:11:53,693 INFO L192 MainTranslator]: Completed translation [2019-10-02 22:11:53,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:11:53 WrapperNode [2019-10-02 22:11:53,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 22:11:53,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 22:11:53,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 22:11:53,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 22:11:53,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:11:53" (1/1) ... [2019-10-02 22:11:53,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:11:53" (1/1) ... [2019-10-02 22:11:53,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:11:53" (1/1) ... [2019-10-02 22:11:53,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:11:53" (1/1) ... [2019-10-02 22:11:53,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:11:53" (1/1) ... [2019-10-02 22:11:53,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:11:53" (1/1) ... [2019-10-02 22:11:53,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:11:53" (1/1) ... [2019-10-02 22:11:53,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 22:11:53,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 22:11:53,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 22:11:53,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 22:11:53,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:11:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 22:11:54,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 22:11:54,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 22:11:54,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 22:11:54,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 22:11:54,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-02 22:11:54,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 22:11:54,078 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 22:11:54,078 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 22:11:54,078 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-02 22:11:54,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 22:11:54,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 22:11:54,079 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 22:11:54,079 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 22:11:54,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 22:11:54,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 22:11:57,746 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 22:11:57,747 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 22:11:57,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 10:11:57 BoogieIcfgContainer [2019-10-02 22:11:57,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 22:11:57,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 22:11:57,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 22:11:57,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 22:11:57,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 10:11:51" (1/3) ... [2019-10-02 22:11:57,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0aa524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 10:11:57, skipping insertion in model container [2019-10-02 22:11:57,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:11:53" (2/3) ... [2019-10-02 22:11:57,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0aa524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 10:11:57, skipping insertion in model container [2019-10-02 22:11:57,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 10:11:57" (3/3) ... [2019-10-02 22:11:57,760 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label48.c [2019-10-02 22:11:57,771 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 22:11:57,781 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 22:11:57,798 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 22:11:57,830 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 22:11:57,831 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 22:11:57,831 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 22:11:57,831 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 22:11:57,831 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 22:11:57,832 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 22:11:57,832 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 22:11:57,832 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 22:11:57,878 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-02 22:11:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-02 22:11:57,893 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 22:11:57,894 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 22:11:57,896 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 22:11:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 22:11:57,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1448610927, now seen corresponding path program 1 times [2019-10-02 22:11:57,904 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 22:11:58,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:11:58,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 22:11:58,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:11:58,018 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 22:11:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 22:11:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 22:11:58,296 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 22:11:58,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 22:11:58,297 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 22:11:58,302 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 22:11:58,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 22:11:58,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 22:11:58,320 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-02 22:12:03,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 22:12:03,138 INFO L93 Difference]: Finished difference Result 1480 states and 2747 transitions. [2019-10-02 22:12:03,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 22:12:03,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2019-10-02 22:12:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 22:12:03,181 INFO L225 Difference]: With dead ends: 1480 [2019-10-02 22:12:03,181 INFO L226 Difference]: Without dead ends: 1412 [2019-10-02 22:12:03,185 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 22:12:03,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-02 22:12:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-02 22:12:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-02 22:12:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-02 22:12:03,339 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 60 [2019-10-02 22:12:03,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 22:12:03,341 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-02 22:12:03,342 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 22:12:03,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-02 22:12:03,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-02 22:12:03,355 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 22:12:03,355 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 22:12:03,356 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 22:12:03,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 22:12:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1160293157, now seen corresponding path program 1 times [2019-10-02 22:12:03,357 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 22:12:03,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:12:03,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 22:12:03,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:12:03,360 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 22:12:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 22:12:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 22:12:03,627 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 22:12:03,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 22:12:03,627 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 22:12:03,629 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 22:12:03,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 22:12:03,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 22:12:03,630 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-02 22:12:09,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 22:12:09,926 INFO L93 Difference]: Finished difference Result 2882 states and 5191 transitions. [2019-10-02 22:12:09,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 22:12:09,933 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-10-02 22:12:09,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 22:12:09,951 INFO L225 Difference]: With dead ends: 2882 [2019-10-02 22:12:09,952 INFO L226 Difference]: Without dead ends: 2882 [2019-10-02 22:12:09,953 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 22:12:09,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2019-10-02 22:12:10,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2858. [2019-10-02 22:12:10,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2858 states. [2019-10-02 22:12:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 5137 transitions. [2019-10-02 22:12:10,111 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 5137 transitions. Word has length 149 [2019-10-02 22:12:10,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 22:12:10,114 INFO L475 AbstractCegarLoop]: Abstraction has 2858 states and 5137 transitions. [2019-10-02 22:12:10,114 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 22:12:10,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 5137 transitions. [2019-10-02 22:12:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-02 22:12:10,125 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 22:12:10,125 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 22:12:10,126 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 22:12:10,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 22:12:10,128 INFO L82 PathProgramCache]: Analyzing trace with hash 610889412, now seen corresponding path program 1 times [2019-10-02 22:12:10,128 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 22:12:10,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:12:10,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 22:12:10,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:12:10,131 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 22:12:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 22:12:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 22:12:10,264 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 22:12:10,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 22:12:10,265 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 22:12:10,265 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 22:12:10,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 22:12:10,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 22:12:10,266 INFO L87 Difference]: Start difference. First operand 2858 states and 5137 transitions. Second operand 6 states. [2019-10-02 22:12:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 22:12:20,468 INFO L93 Difference]: Finished difference Result 8774 states and 14049 transitions. [2019-10-02 22:12:20,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 22:12:20,469 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2019-10-02 22:12:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 22:12:20,534 INFO L225 Difference]: With dead ends: 8774 [2019-10-02 22:12:20,535 INFO L226 Difference]: Without dead ends: 8774 [2019-10-02 22:12:20,536 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-02 22:12:20,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2019-10-02 22:12:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 8718. [2019-10-02 22:12:20,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8718 states. [2019-10-02 22:12:20,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8718 states to 8718 states and 13631 transitions. [2019-10-02 22:12:20,996 INFO L78 Accepts]: Start accepts. Automaton has 8718 states and 13631 transitions. Word has length 150 [2019-10-02 22:12:20,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 22:12:20,996 INFO L475 AbstractCegarLoop]: Abstraction has 8718 states and 13631 transitions. [2019-10-02 22:12:20,996 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 22:12:20,996 INFO L276 IsEmpty]: Start isEmpty. Operand 8718 states and 13631 transitions. [2019-10-02 22:12:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-02 22:12:21,001 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 22:12:21,001 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 22:12:21,001 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 22:12:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 22:12:21,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1350391872, now seen corresponding path program 1 times [2019-10-02 22:12:21,002 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 22:12:21,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:12:21,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 22:12:21,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 22:12:21,008 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 22:12:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 22:12:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 106 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 22:12:21,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 22:12:21,236 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 22:12:21,237 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 220 with the following transitions: [2019-10-02 22:12:21,239 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1855], [1863], [1871], [1879], [1887], [1895], [1903], [1911], [1919], [1927], [1935], [1943], [1951], [1959], [1967], [1975], [1983], [1991], [1999], [2007], [2011], [2013], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2116], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2200], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-10-02 22:12:21,307 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 22:12:21,308 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 22:12:25,448 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 22:12:25,450 INFO L272 AbstractInterpreter]: Visited 95 different actions 95 times. Never merged. Never widened. Performed 229 root evaluator evaluations with a maximum evaluation depth of 13. Performed 229 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 22:12:25,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 22:12:25,454 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 22:12:28,602 INFO L227 lantSequenceWeakener]: Weakened 200 states. On average, predicates are now at 78.37% of their original sizes. [2019-10-02 22:12:28,602 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 22:12:28,671 INFO L420 sIntCurrentIteration]: We unified 218 AI predicates to 218 [2019-10-02 22:12:28,671 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 22:12:28,672 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 22:12:28,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2019-10-02 22:12:28,672 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 22:12:28,673 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 22:12:28,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 22:12:28,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 22:12:28,674 INFO L87 Difference]: Start difference. First operand 8718 states and 13631 transitions. Second operand 10 states. [2019-10-02 22:14:15,110 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.